Experience the charm of mild and humid weather in Brussels, Belgium, with temperatures averaging 12°C (54°F) in winter and a pleasant 20°C (68°F) in summer. The city boasts over 19 rainy days per month, making an umbrella a must-have accessory. Surprisingly, Brussels' rainfall contributes to its lush parks, perfect for picnics at Parc du Cinquantenaire during the blooming spring season. Visit in May or September for a comfortable climate and fewer tourists!
Today's Forecast
5-Day Forecast
Brussels Climate & Weather Averages
Brussels is warmest in August, when daytime highs average 23°C, and coldest in January at around 6°C. The wettest month is December. The table below shows the monthly averages for Brussels, based on recorded data from 2015–2024.
| Month | Avg High | Avg Low | Rainfall |
|---|---|---|---|
| Jan | 6° | 2° | 75 mm |
| Feb | 8° | 2° | 67 mm |
| Mar | 11° | 3° | 71 mm |
| Apr | 14° | 5° | 47 mm |
| May | 18° | 9° | 63 mm |
| Jun | 22° | 13° | 71 mm |
| Jul | 23° | 14° | 68 mm |
| Aug | 23° | 15° | 59 mm |
| Sep | 20° | 12° | 64 mm |
| Oct | 16° | 9° | 72 mm |
| Nov | 10° | 5° | 69 mm |
| Dec | 8° | 3° | 75 mm |
A warming climate: Brussels's warmest month (August) has warmed from an average high of 21°C in the 1950s to 23°C today — a shift of +2.4°C over roughly seventy years.
Best time to visit: July–September offers the most comfortable conditions, with daytime highs around 22°C. Pack light, breathable layers and a light waterproof — Brussels sees rain year-round, peaking in December. For the coldest spell around January, bring a warm coat.
Source: Open-Meteo ERA5 archive. Averages computed from daily records.